1. Southeastern Cooperative Wildlife Disease Study, Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, Georgia 30602, USA
2. Veterinary Services, Animal and Plant Health Inspection Service, United States Department of Agriculture, 9600 Two Notch Road, Suite 10, Columbia, South Carolina 29223, USA
3. Rollins Animal Disease Diagnostic Laboratory, North Carolina Department of Agriculture and Consumer Services, 2101 Blue Ridge Road, Raleigh, North Carolina 27607, USA